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Today’s EIO post is on audio amplifier boards. Amplifiers are devices that increase the gain of an audio signal and currently dominate modern audio technologies. With audio amplifier boards, you can design and build your own audio amplifier from scratch using basic electrical engineering principles.

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Introduction:

The term amplifier refers to any device that increases the amplitude of a signal, usually measured in voltage or current. This versatile device is used in a variety of different electronic applications. Especially in audio technology, a wide range of amplifiers can be produced based on product specifications (i.e. power, voltage, current). Currently, there are many types of audio amplifiers available for consumers. Sound signal amplification is used for instruments, such as the guitar or the bass. They are also used commonly in home theater systems and with stereo speakers. The basic design behind all of these amplifiers is derived from the simplest concepts of circuit design.

Classes of Amplifiers:

Assembled in different configurations, resistors, capacitors, and transistors can create several classes of amplifiers that can be distinguished by performance characteristics. Class A amps are very linear (meaning the integrity of the signal is maintained through the amplification process); however, this amplifier topology is known to be very inefficient. In addition, Class A amplifiers invert the signal (meaning the function is reflected over its axis). Class B amps are much less linear, leading to higher distortion of the signal, but they are much more efficient. Since a Class B amp only amplifies half of a signal, two Class B amps are generally used in synchronization. The compromise between these two topologies is the Class AB amplifier. The Class AB is more efficient than the Class A with lower distortion than the Class B. Often the different types of amplifiers are used in combination with other amplifiers into order to achieve the specifications of a particular design.

Some of Our Products:

Sure Electronics AA-AB32291 2 X 250Watt Class D Audio Amplifier Board – IRS2092

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supplier: Sure Electronics859

part #: AA-AB32291

Suppliers: Sure Electronics  Type: Audio
Each channel is rated at 250WEfficiency: 90% @ 250W,8Ω, Class D stage
Model
Brand Sure Electronics
Model AA-AB32291
Specifications
Specifications Output Power: Each channel is rated at 250W
·Efficiency: 90% @ 250W,8Ω, Class D stage
·Multiple Protection Features: Over-current protection (OCP), high side and low side MOSFET
·Over-voltage protection (OVP)
·Under-voltage protection (UVP), high side and low side MOSFET
·DC-protection (DCP)
·Over-temperature protection (OTP)
·PWM topology: Self-oscillating PWM and half-bridge.·Power Supply Voltages:±60V
·Load Impedance:8Ω
Features
Features
This 2 X 250Watt Class D Audio Amplifier Board – IRS2092 is a state-of-the-art dual channel Class-D audio amplifier which integrates IRS2092 Class D audio driver IC, along with IR’s digital audio dual MOSFETs. This amplifier is capable of delivering dual-channel amplification with each channel up to 250W. High quality and high performance components are used making this amplifier high-quality amplifier. Powered by ± 55V to ± 65V supply, it can be used in many ampplications like Background Music Systems. It also features thermal protection, Over-current protection, Over-voltage protection, Under-voltage protection and DC-protection. In addition, on-board heat sink ensures excellent heat dissipation.
This is an exceptionally well designed amplifier, with low distortion, good S/N ratio, low consumption and full protection. Having all these almost ideal characteristics this amplifier is likely to become the basic building block of your future high fidelity system, or it can also become the element that will upgrade your existing system.

Sure Electronics AA-AB32261 2 X 150 mW Class-AB Headphone Amplifier Board – LM4881

41715

supplier: Sure Electronics859

part #: AA-AB32261

Suppliers: Sure Electronics  Type: Audio
0.025% THD+N @120mWrms 16Ω0.02% THD+N @75mWrms 32Ω
Model
Brand Sure Electronics
Model AA-AB32261
Specifications
Specifications Features:
Thermal shutdown protection circuitry
Adjustable gain
Wide power supply range: 8V-24V
Audiophile Quality Sound:
0.025% THD+N @120mWrms 16Ω¸
0.02% THD+N @75mWrms 32Ω¸
Applications:
Mini/Micro Systems
Personal Computers
Microphone Preamplifier
MP3 Video CD Output Amplification
Features
Features Use this DIY 2*150mW audio amplifier board which is a perfect class-AB architecture integrated LM4881 chips to achieve the single-channel 150mW power output. Moreover, integrated with LM4881 chip, this board also supports two-channel amplification and can be powered by any DC power supply ranging from 8V to 24V.

Sure Electronics AA-AB32191 2 X 300Watt Class-D Audio Amplifier Board – TAS5630

41716

supplier: Sure Electronics859

part #: AA-AB32191

Suppliers: Sure Electronics
Type: Audio
Frequency response: 20Hz to 20KHz(±3dB)Power supply: 20V to 50VDynamic Range: >100 dB
Model
Brand Sure Electronics
Model AA-AB32191
Specifications
Specifications
  • Power supply: 20V to 50V
  • Channel Separation: >89 dB 1 kHz
  • Dynamic Range: >100 dB
  • Frequency response: 20Hz to 20KHz(±3dB)
  • Signal/Noise Ratio: 100dB(A-Weighted)
  • High Output Power
50W @4 Ω, <0.02% THD+N
100W @ 4 Ω, <0.03% THD+N
200W @ 8Ω, < 0.40% THD+N
  • Operating Temperature: 0℃ to 50℃
  • Storage Temperature: -20℃ to 105℃
Features
Features Another new member of Class-D audio amplifier family comes out – AA-AB32191 which is capable of delivering dual channel amplification with each channel up to 300W. This amplifier is a state-of-the-art dual channel Class-D audio amplifier which integrates TI’s TAS5630 as the driver. High quality and high performance components are used making this amplifier high-quality amplifier. Powered by 20V to 50V supply, it can be used in many applications, such as Home Active Speaker, AV Receiver, Mini Combo System, etc.. It also features short-circuit and thermal protection. In addition, on-board heat sink and cooling fan ensures excellent heat dissipation.
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With the new release of the iPhone 5 in full swing, we are here to offer all of those who will not be upgrading to the new device a few reasons to be content with your older generation iPhone.  Here are some of our products to consider that are still compatible with your older device’s 30-pin connector. The new iPhone 5 has a new connection port called Lightning, and it’s not compatible with any existing hardware. Sure, you can buy a huge adapter for $29 (!), but this adapter won’t help connect all those accessories with built-in iPhone docks. Plus, the adapter is huge, and will no doubt be an eyesore against the new iPhone 5′s beautiful aesthetic.

And if you just bought a new car with a built-in 30-pin iPhone connector, the large white adapter is certain to detract from the intended seamless iPhone integration.

 

GRIFFIN 9562-NAVIGT Navigate Inline Controller and FM Radio

 

 

Model
Brand Griffin Technology
Series Navigate
Model 9562-NAVIGT
Type Others
iPod Compatibility
Yes
Features
Features
Compact inline remote control and radio for iPhone and iPod

Built-in OLED shows screen info from your iPod

Provides Playlist, EQ, and Shuffle Mode navigation

Play, Stop, Pause, Forward, Backward, and Scan controls that your fingers can locate by touch

FM stereo radio with RDS track info display and 4 station presets

Spec
Color Black
iPod Compatibility
2nd Gen iPod touch Compatible
Yes
1st Gen iPod touch Compatible
Yes
iPod classic Compatible
Yes
iPod video Compatible
Yes
4th Gen iPod nano Compatible
Yes
3rd Gen iPod nano Compatible
Yes
2nd Gen iPod nano Compatible
Yes
iPhone Compatible
Yes
iPhone 3G Compatible
Yes
iPhone 3G S Compatible
Yes

 

 

 

GRIFFIN 9783-TJ3 TuneJuice Charger for iPod / iPhone, Black

 

Model
Brand Griffin Technology
Model 9783-TJ3
Type Charger
iPod Compatibility
Yes
Features
Features
Charges iPhone or any iPod with a dock connector

Uses 4 AAA batteries (included)

Hours more music, video, talk time, web access

iPod Compatibility
2nd Gen iPod touch Compatible
Yes
1st Gen iPod touch Compatible
Yes
iPod classic Compatible
Yes
iPod video Compatible
Yes
5th Gen iPod nano Compatible
Yes
4th Gen iPod nano Compatible
Yes
3rd Gen iPod nano Compatible
Yes
2nd Gen iPod nano Compatible
Yes
1st Gen iPod nano Compatible
Yes
iPod mini Compatible
Yes
iPod Photo Compatible
Yes
iPhone Compatible
Yes
iPhone 3G Compatible
Yes
iPhone 3G S Compatible
Yes
GRIFFIN 10019-SIMPLIFI Simplifi Dock for iPod and iPhone with Card Reader and USB Hub, Aluminum

Model
Brand Griffin Technology
Series Simplifi
Model 10019-SIMPLIFI
Type Dock
iPod Compatibility
Yes
Features
Features
Charge/sync Hub For iPhone And IPod

Reads And Writes The Most Popular Digital Media Cards

2-port Powered USB Hub, Using Included AC Adapter

A Simple, Versatile Way To De-clutter Your Desktop

Spec
Color
White

 

Today’s EIO post is on products that can be used to get your kids involved in learning mechanics and strengthening their technical skills.

Pros of Getting Your Kid Involved in Do-It-Yourself Projects

Although children get the fundamentals of math and science at school, it is beneficial to reinforce this knowledge with projects that spur their enthusiasm and excitement for learning more about the way the world works.  From building blocks in kindergarten to legos in elementary school, kids have always been inclined to building things with their own hands.  With some of our products, you can continue to foster your kids enthusiasm for learning with some more advanced DIY projects.

OWI OWI-MSK613 3 In 1 Solar Stallion

This solar-powered kit helps kids understand the benefits of renewable energyEasy-to-build equine choices: ‘Horse Trainer’, ‘Pegasus’, or ‘Chariot’.
Model
Brand OWI
Model OWI-MSK613
Specifications
Type Educational Solar Kit
Features
Features Triple your fun in the sun with 3- in-1 Solar Stallion. This solar-powered kit helps kids understand the benefits of renewable energy while creating their own fun, battery-free toy. It’s exciting to watch solar energy make the product come to life, and this hand-on approach to science and building creates a tangible lesson in solar energy for girls and boys alike.

Young horse lovers will especially enjoy assembling and re-assembling these easy-to-build equine choices:  ‘Horse Trainer’, ‘Pegasus’, or ‘Chariot’.

 

 

 

 

 

 

VELLEMAN KNS10 FUEL CELL CAR SCIENCE KIT

Fuel cell that combines electrolysis and power conversion into one single device.
Model
Brand VELLEMAN
Model KNS10
Specifications
Type Fuel Cell Car Kit
Features
Features This Fuel Cell Car Science Kit uses a reversible PEM fuel cell that combines electrolysis and power conversion into one single device. Watch as oxygen and hydrogen gases are formed in two transparent water containers. The car steers independently of the user once in operation: when the car hits a barrier, it will automatically find its way by reversing away 90 degrees. This fun science kit combines cutting-edge science, education and fun for all!

  • recommended age: 14 years and up
  • this kit contains:
    • PEM reversible fuel cell module
    • car chassis & wheels
    • electric motor
    • flashing LED lights
    • water vessels
    • gas collectors
    • connector cables
    • syringe
    • battery pack for 2x 1.5V AA batteries (LR6C, not incl.)
    • user manual on CD

 

 

 

 

 

VELLEMAN KNS11 H-RACER 2.0 (IR) & HYDROGEN STATION KIT

Futuristic hydrogen car science kit is an amazing way to demonstrate the use of cutting-edge alternative energy
Model
Brand VELLEMAN
Model KNS11
Specifications
Type Hydrogen Station Kit
Features
Features This futuristic hydrogen car science kit is an amazing way to demonstrate the use of cutting-edge alternative energy and automotive technologies. Its partly transparent body displays the inner mechanics of the car. The car’s assembly instructions make it easy and fun to build, and also provides interesting education on real-world challenges.

  • recommended age: 12 years and up
  • this kit contains:
    • H-racer chassis & body
    • fuel cell system components
    • hydrogen refuelling station (2 x 1.5V AA, LR6C, not incl.)
    • solar panel & connectors
    • infrared remote control (3 x LR44, not incl.)
    • assembly & operation manual

 

An Introduction to Headsets

eiodotcom —  September 14, 2012 — Leave a comment

Today’s EIO post is on Speakers and Headsets.

 

Health Benefits of Headsets

Headsets.com says:

What will a headset do for you? Did you know that using a headset on a daily basis will reduce unnecessary back pain and fatigue caused by cradling the phone on your shoulder? Using a headset as part of your daily work routine will help improve your posture, and make you feel more active and refreshed at the end of the work day.

Not only does a headset help you physically, it also increases your work productivity. Studies have shown that using a headset instead of holding the phone frees up a hand and can improve productivity by up to 43%.

 

Other Benefits From Using a Headset:

Hands-Free:

Enjoy the luxury of not having to juggle with a telephone handset, and enjoy new levels of productivity with both hands now free.

Productivity Benefit:

Increased speed! Enjoy the ability to perform multiple tasks quickly and easily, allowing you to improve the speed of your daily tasks.

Mobility Benefit:

You no longer have to be stuck to your desk or have a limited radius to move around the office! With a headset, you can move around as much as you want and multitask.

 

Products available through EIO

 

VELLEMAN HSMT1 TELEPHONE & MULTIMEDIA HEADSET WITH MICROPHONE

 

The Velleman HSMT1 is your basic headset (compatible with both your laptops/computers or telephone system).

Specs:

Suppliers: VELLEMAN
Mono headphone with Ø.11″ drive unit
With microphone
RJ-type connection adapter provided for telephone connection (TCU18C)
Brand VELLEMAN
Model PSUC100
Specifications
Specifications
  • headphones:
    • drive unit: 1.1″ Ø
    • cable length: 5.6ft
    • max. input power: 30mW
    • impedance: 150ohm
    • 1/8″ plug
  • microphone:
    • type: electret condenser
    • directivity: omnidirectional
    • 1/8″ plug
Features
Features
  • mono headphone with Ø.11″ drive unit
  • with microphone
  • RJ-type connection adapter provided for telephone connection (TCU18C)

 

 

Continuing on in our emphasis at making electronics easily accesible and understandable, Eio presents a non-technical explanation of resistors.

What is a resistor? What does it do?

American resistor symbol

A resistor is an electronic component whose purpose is to “resist” (oppose) the flow of electrical current. Resistors are most commonly used in electronic circuits, which are devices that allow electric currents to flow. Dummies.com says, “because resistance is an essential element of nearly every electronic circuit, you’ll use resistors in just about every circuit that you build.”

Resistance is measured in ohms (Ω), where the relationship between current, volts, and resistance is represented by ohm’s law. PlaywithArduino states that to understand resistance, one must understand voltage and current, as defined here:

  • voltage (V) is the measure of the strength electric charges are attracted between the two points
  • current (I) is the measure of how many electric charges are moving per unit time between the two points.

Resistors dissipate power by resisting or limiting the voltage and thus bring down the electricity flow. If a resistor dissipates too much power, it will burn up. Be sure to check the amount of resistance it can handle, often denoted by 1/8, 1/4, 1/2, 1, and 2 watts.

What are resistors used for?

Xicon 3.3 Ohms 1/4 Watt Carbon Film Resistor

Resistors, according to Mhuss.com, are used in the following areas:

  • Plate resistor (usually a load)
  • Cathode resistor (usually for biasing, sometimes a load)
  • Grid resistor (to limit ultra HF response)
  • Screen resistor (to limit screen current)
  • Bias resistor (to keep the grid at a constant DC level, often zero or ground)
  • Voltage divider (to cut down the signal level, particularly in high gain amps)
  • Part of an RC low-pass filter (to both lower the voltage and reduce the ripple in the “downstream” parts of a power supply)

So visit our Eio site for all your resistor needs!

VELLEMAN K/RES-E12 PACK OF 610 E12-SERIES RESISTORS

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